Water Column Pressure Load on a Cylindrical Tank & Constrains

[marioig22]

Good morning!

I am trying to simulate a plastic water tank under a varying pressure load due to water column, so I used a Pressure Load in function of my Z axis (height) using rho*g*h=P where h=Z. And I have two doubts:

Am I using the pressure load function correctly? When I do a Resultant Load Review I get very large forces (in the order of e+14 Newtons, that is why I am getting doubts.

I am not sure how to constraint this model, should I select a surface constrained in the Z-axis because it should have deformation in the radial direction? Or which other way can I constrain this tank?

Hope this is enough information to get help. I am attaching the model so it help me explaining better.

Link

Link

Regards,

Mario

 

[shaun8567]

I'll try to look at your model later tonight, but if you're getting values that are orders of magnitude larger than your hand calculations, then I'd go and double/triple check your units for everything.

 

[brep]

I suspect your units of rho are wrong.
Remember that in NmmS system of units (where Pressure/Stress is in MPa) then the units for rho will be tonne/mm3

i.e. water's density is approx 1e-9 T/mm3